Sandstone
Arenite (SiO2 based)
sedimentary
Category
Mineral (Sedimentary Context)
Browse mineral (sedimentary context) specimens identified by the Rock Identifier community.
Chert Conglomerate (or Breccia)
Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Glacial Cobble)
Arenite / Sedimentary Rock (primarily SiO2)
sedimentary
Banded Agate (with possible Chalcedony layers)
Silicon dioxide (SiO2)
sedimentary
Asphalt (Bituminous pavement fragment)
Artificial conglomerate / Bitumen-Aggregate mixture
sedimentary
Banded Onyx (Cave Calcite)
Calcite (CaCO3), often called Mexican Onyx or Travertine
sedimentary
Septarian Nodule (Yellow Calcite in Limestone)
Septarian Concretion (CaCO3 with Aragonite and Calcite)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Agate Geode
Chalcedony (cryptocrystalline SiO2)
mineral
Amber
Amber (C10H16O)
mineral
Staurolite (Fairy Cross)
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Precious Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Gneiss (specifically Biotite Gneiss)
Gneiss (high-grade metamorphic rock primarily composed of Silicates)
metamorphic
Laterite
Laterite (no specific mineral formula as it's a rock type)
Sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony)
Sedimentary
Amber
Succinite (Resin C10H16O)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Banded Agate
Silicon Dioxide (SiO₂)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Jasper with Chalcedony
Silicon Dioxide (SiO2)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
White Agate / Chalcedony
Silicon Dioxide (SiO2)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Celestite
Celestine (Strontium Sulfate, SrSO4)
mineral
Yellow Chalcedony (Agate/Jasper mix)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Nobby Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine or Yellow Jasper)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral